Check out this IDC report. IBM #1 in Business Process Outsourcing. Ranked #1 in all the 4 categories:
Respondent segments spanned: F&A, Customer Care, HR, and procurement
Who else made it into the report, behind IBM?
Accenture, HP-EDS, ADP, Unisys, Infosys, ...
Social Business transformation
Matching: infosys X